When I first start my computer (iMac 24'' 2008) and open Vent, I can use it fine. Talk, listen, no problem. Then after a while, people can no longer hear me. When I press my PTT button (I use the "Alt" button on a Windows keyboard, the "Windows" button is binded to Command), I hear the little beep, my icon turns green. Still, no one can hear me. I did not restart the client, just seems to "die" after a while. Any suggestions? Thanks for any help.

What OS are you running
What version of Vent
Are you using a USB Headset, and if so, what kind.
Do you have any other USB devices plugged into the computer other than the Keyboard/Mouse and the headset? If so, what are they?

I am using the built-in microphone of the iMac.
My keyboard and mouse are the only USB devices plugged in.

One possibility I just thought of. It could just be my own computer failing to pick up microphone input after a while. I would only notice this with Vent because I don't use the mic for anything else. I will attempt to investigate this hypothesis and report my findings.